<template>
  <div class="upload-file">
    <!-- <el-upload
      :action="uploadFileUrl"
      :before-upload="handleBeforeUpload"
      :file-list="fileList"
      :limit="limit"
      :on-error="handleUploadError"
      :on-exceed="handleExceed"
      :on-success="handleUploadSuccess"
      :show-file-list="false"
      :headers="headers"
      class="upload-file-uploader"
      ref="upload"
      multiple
      :disabled="upload_disabled"
    >
      <i class="el-icon-circle-plus-outline" title="上传文件格式:docx/doc/xls/ppt/txt/pdf/png/jpg/jpeg/gif/GIF" style="color:#1890FF;font-size:30px;"></i>
    </el-upload> -->
      <!-- 上传提示 -->
      <!-- <div class="el-upload__tip" slot="tip" v-if="showTip">
        请上传
        <template v-if="fileSize"> 大小不超过 <b style="color: #f56c6c">{{ fileSize }}MB</b> </template>
        <template v-if="fileType"> 格式为 <b style="color: #f56c6c">{{ fileType.join("/") }}</b> </template>
        的文件
      </div> -->
    

    <!-- 文件列表 -->
    <transition-group class="upload-file-list el-upload-list el-upload-list--text" name="el-fade-in-linear" tag="ul">
      <li class="el-upload-list__item ele-upload-list__item-content" v-for="(file, index) in fileList_show" :key="file.uuid">
        <el-link :href="file.url" :underline="false" target="_blank">
          <span><i class="el-icon-paperclip" style="color:blue;"></i>&nbsp;&nbsp;{{index+1}}. {{ file.name }}</span>
        </el-link>
        <!-- <span><i class="el-icon-paperclip" style="color:blue;"></i>&nbsp;&nbsp;{{index+1}}. {{ file.name }} </span> -->
        <div class="ele-upload-list__item-content-action">
          <el-link :underline="false" type="primary" :href="file.url" target="_blank">下载</el-link>
          <el-link :underline="false" @click="handleDelete(index)" type="danger" v-if="!upload_disabled">删除</el-link>
        </div>
      </li>
    </transition-group>
  </div>
</template>

<script>
import { getToken } from "@/utils/auth";

export default {
  name: "FileUploads",
  props: {
    // 值
    value: [String, Object, Array],
    // 数量限制
    limit: {
      type: Number,
      default: 10000,
    },
    attachName: {
      type: String,
      default: "上传文件"
    },
    // 大小限制(MB)
    fileSize: {
      type: Number,
      default: 1024,
    },
    // 文件类型, 例如['png', 'jpg', 'jpeg']
    fileType: {
      type: Array,
      default: () => ["docx","doc", "xls", "ppt", "txt", "pdf","png", "jpg", "jpeg","gif","GIF"],
    },
    // 是否显示提示
    isShowTip: {
      type: Boolean,
      default: true
    },
    fileList_show: {
      type: Array,
      default: () => [],
    },
    upload_disabled: {
      type: Boolean,
      default: false,
    },
  },
  data() {
    return {
      number: 0,
      uploadList: [],
      uploadFileUrl: process.env.VUE_APP_BASE_API + "/file/upload", // 上传的图片服务器地址
      headers: {
        Authorization: "Bearer " + getToken(),
      },
      fileList: [],
    };
  },
  watch: {
    value: {
      handler(val) {
        if (val) {
          let temp = 1;
          // 首先将值转为数组
          const list = Array.isArray(val) ? val : this.value.split(',');
          // 然后将数组转为对象数组
          this.fileList = list.map(item => {
            if (typeof item === "string") {
              item = { name: item, url: item };
            }
            item.uid = item.uid || new Date().getTime() + temp++;
            return item;
          });
        } else {
          this.fileList = [];
          return [];
        }
      },
      deep: true,
      immediate: true
    }
  },
  computed: {
    // 是否显示提示
    showTip() {
      return this.isShowTip && (this.fileType || this.fileSize);
    },
  },
  created(){
  },
  methods: {
    // 上传前校检格式和大小
    handleBeforeUpload(file) {
      // 校检文件类型
      if (this.fileType) {
        let fileExtension = "";
        if (file.name.lastIndexOf(".") > -1) {
          fileExtension = file.name.slice(file.name.lastIndexOf(".") + 1);
        }
        const isTypeOk = this.fileType.some((type) => {
          if (file.type.indexOf(type) > -1) return true;
          if (fileExtension && fileExtension.indexOf(type) > -1) return true;
          return false;
        });
        if (!isTypeOk) {
          this.$message.error(`文件格式不正确, 请上传${this.fileType.join("/")}格式文件!`);
          return false;
        }
      }
      // 校检文件大小
      if (this.fileSize) {
        const isLt = file.size / 1024 / 1024 < this.fileSize;
        if (!isLt) {
          this.$message.error(`上传文件大小不能超过 ${this.fileSize} MB!`);
          return false;
        }
      }
      this.loading = this.$loading({
        lock: true,
        text: "上传中",
        background: "rgba(0, 0, 0, 0.7)",
      });
      this.number++;
      return true;
    },
    // 文件个数超出
    handleExceed() {
      this.$message.error(`上传文件数量不能超过 ${this.limit} 个!`);
    },
    // 上传失败
    handleUploadError(err) {
      this.$message.error("上传失败, 请重试");
       this.loading.close();
    },
    // 上传成功回调
    handleUploadSuccess(res, file) {
      // this.fileList_show = [];
      this.uploadList.push({ name: res.data.name, url: res.data.url,uid:res.data.uuid});
      if (this.uploadList.length === this.number) {
        this.fileList = this.fileList.concat(this.uploadList);
        // this.fileList_show = this.fileList_show.concat(this.uploadList);
        // console.log(this.fileList_show)
        this.$emit("addlist", this.uploadList);
        this.uploadList = [];
        this.number = 0;
        this.$emit("input", this.listToString(this.fileList));
        this.loading.close();
      }
    },
    // 删除文件
    handleDelete(index) {
      // this.fileList_show.splice(index, 1);
      this.$emit("deletlist", index);
      this.fileList.splice(index, 1);
      this.$emit("input", this.listToString(this.fileList));
    },
    handleDownload(index){
      var filename =  this.fileList_show[index].url;
      location.href = process.env.VUE_APP_BASE_API+"/file/download?fileName=" + (filename.substring(filename.lastIndexOf("/statics")+8));
    },
    // 获取文件名称
    getFileName(name) {
      if (name.lastIndexOf("/") > -1) {
        return name.slice(name.lastIndexOf("/") + 1).toLowerCase();
      } else {
        return "";
      }
    },
    // 对象转成指定字符串分隔
    listToString(list, separator) {
      let strs = "";
      separator = separator || ",";
      for (let i in list) {
        strs += list[i].url + separator;
      }
      return strs != '' ? strs.substr(0, strs.length - 1) : '';
    }
  }
};
</script>

<style scoped lang="scss">
.upload-file-uploader {
  margin-bottom: 5px;
}
.upload-file-list .el-upload-list__item {
  border: 1px solid #e4e7ed;
  line-height: 2;
  margin-bottom: 10px;
  position: relative;
}
.upload-file-list .ele-upload-list__item-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: inherit;
}
.ele-upload-list__item-content-action .el-link {
  margin-right: 10px;
}
</style>